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Messages - bigtoy302

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1
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: April 18, 2010, 11:02:16 PM »
So today I bent up my first project. This is the reason I built the brake. I have other products planned but these will be them main thing that I will be building. Even though this thing has a lot of steel bending 2ft of 1/4" still flexes the machine several thousandths. So I have to add more angle to the longer bends then the shorter ones. Not a huge problem but I still have bend some longer parts to really see.




2
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: April 04, 2010, 02:07:52 AM »
Hi, very nice project and very impressive.

For myself, the best way to configure Solidworks for sheet metal, is to build your own Excel sheet with value you get from bending on your press.

K factor is good but very limited.

Before bending, try with a scrap piece of the same material and enter in your Excel sheet the value you got.

Best luck.

Jeff

I had to go down to a k-factor of .34 on .250 and .188 HR steel to get it to hold tolerance. Should I use bend allowance instead? I am new to all this.

3
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: April 04, 2010, 12:16:19 AM »
Finally got some more time to mess with it. I bent up a bunch of test pieces getting everything dialed in. I bought Solidworks 2010 this week so I am trying to get the K-factor dialed in on the software. Here is a better video of the brake and a test part.


http://www.youtube.com/watch?v=38hfwvIbnjo

4
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: March 07, 2010, 11:38:42 PM »
Excellent work. What's the gauge of sheet and what's the bend radius.

Zafar

11 gauge steel, bent using a 1.5" lower die. I think its about a .250 radius.

5
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: March 07, 2010, 09:15:40 PM »
Today I bent up a tray for the computer to sit on and made a articulating arm for it to mount to. I still need to figured out how to get the backgauge to home in the dynomotion software. Everything is written in C+ and I don't know jack about it.



6
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: March 07, 2010, 12:33:50 AM »
I got a little bit more done on it tonight. I finished wiring the limit and home switches. Here is a quick video of the back gauge in action.

YouTube - Mach3 dynomotion Cnc press brake

7
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: February 21, 2010, 10:58:43 PM »

8
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: February 21, 2010, 10:55:40 PM »
I got a little bit more done this weekend. I mounted the the linear scale on the ram, wired the motors, valve and started tuning the motors and valve. I still need to mount the home and limit switches. I got everything tuned pretty good. I can move the ram up and down several times and have it repeat within .0005. It is not real fast but it will get the job done. I even bent a piece of scrap I had laying around. I took a short video of the ram doing some 1" moves. I will post it up shortly. Hopefully next weekend I can totally finish this thing up up a bend a bunch of stuff. I will take a good video of the machine when I get it all running.

I still need to tidy up all the wire once everything is final.




I know I said i was going to use a Newall SPB-TS encoder but I was running out of cash and this accu-rite was half the price. They are both 5 micron scales.



9
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: February 14, 2010, 11:32:32 PM »
Today I got the electronics started. I mounted the control box, Wired the power supplies and the motor starter. I also cut out a front plate for a small fan and a db25 connector for the MPG. I also cut out a rear plate for the motor power wires, encoders, limits/homes switches and for the valve.




10
Show"N"Tell ( Your Machines) / Re: My CNC pressbrake build
« on: February 14, 2010, 11:28:56 PM »
Yesterday I got the tank all pressure tested and finished, the backgauge all done and finished all the plumbing. I still need to finish making some support brackets for the hard lines.


















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